100х² - 140ху + 49у² = (10х -7у)²
64b² + 17ab + 121a² = (8b + 11a)²
81a² - 90ab +25b² = (9a - 5b)²
64x² + 96xy +36y² = (8x + 6y)²
49m² + 70mn + 25n² = (7m + 5n)²
25a³ - 80ab + 64b³ = (5a - 8b)²
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100х² - 140ху + 49у² = (10х -7у)²
64b² + 17ab + 121a² = (8b + 11a)²
81a² - 90ab +25b² = (9a - 5b)²
64x² + 96xy +36y² = (8x + 6y)²
49m² + 70mn + 25n² = (7m + 5n)²
25a³ - 80ab + 64b³ = (5a - 8b)²